[{"data":1,"prerenderedAt":185},["ShallowReactive",2],{"leaderboard-total":3,"spot-seo-blow-hole-near-st-helens":9,"spot-blow-hole-near-st-helens":51},{"entries":4,"total":5,"period":6,"type":7,"generated_at":8},[],0,"all_time","reports","2026-10-03T06:32:05.526386Z",{"title":10,"description":11,"canonical_url":12,"og_image":13,"structured_data":14,"breadcrumbs":44},"Snorkeling Conditions at Blow Hole (near St Helens) - How's the Spot","Check snorkeling conditions at Blow Hole (near St Helens), Tasmania. Excellent conditions, water 14.5°C, waves 0.27m","https:\u002F\u002Fhowsthespot.com\u002Fspots\u002Fblow-hole-near-st-helens","https:\u002F\u002Fhowsthespot.com\u002Fog-default.png",[15,28],{"@context":16,"@type":17,"name":18,"description":19,"url":12,"geo":20,"address":24},"https:\u002F\u002Fschema.org","Place","Blow Hole (near St Helens)","The Blow Hole near St Helens is a dramatic coastal feature on Tasmania's northeast coast, where ocean swells surge into a rock crevice and erupt skyward in a powerful spray. Located within reach of...",{"@type":21,"latitude":22,"longitude":23},"GeoCoordinates",-41.321795,148.249813,{"@type":25,"addressRegion":26,"addressCountry":27},"PostalAddress","Tasmania","Australia",{"@context":16,"@type":29,"name":30,"description":11,"url":12,"breadcrumb":31},"WebPage","Snorkeling Conditions at Blow Hole (near St Helens)",{"@context":16,"@type":32,"itemListElement":33},"BreadcrumbList",[34,39,42],{"@type":35,"position":36,"name":37,"item":38},"ListItem",1,"Home","https:\u002F\u002Fhowsthespot.com",{"@type":35,"position":40,"name":26,"item":41},2,"https:\u002F\u002Fhowsthespot.com\u002Fexplore?region=tasmania",{"@type":35,"position":43,"name":18,"item":12},3,[45,47,49],{"label":37,"href":46},"\u002F",{"label":26,"href":48},"\u002Fexplore?region=tasmania",{"label":18,"href":50},"\u002Fspots\u002Fblow-hole-near-st-helens",{"id":52,"name":18,"slug":53,"latitude":22,"longitude":23,"description":54,"difficulty":55,"image_url":56,"status":57,"tide_constituents":58,"hazard_entries":109,"access_info_structured":124,"area_boundary":56,"routes":56,"created_at":131,"updated_at":132,"today_conditions":133,"today_verdict_view":154,"images":180,"submitted_by":181,"region_name":26,"verification_status":183,"verified_at":56,"disputed":184,"verifier_count":5,"last_verified_display_name":56},"f1eb7847-93c8-4c0c-aa5b-827fbddd9e1b","blow-hole-near-st-helens","The Blow Hole near St Helens is a dramatic coastal feature on Tasmania's northeast coast, where ocean swells surge into a rock crevice and erupt skyward in a powerful spray. Located within reach of the Bay of Fires and Binalong Bay, this area features brilliant orange-lichen-covered granite boulders and crystal-clear turquoise waters. Snorkelers can explore calm, protected rocky bays nearby, weaving between boulders in shallow, gin-clear water with excellent visibility over sandy patches and reef.","intermediate",null,"published",{"name":59,"amplitude":75,"phase":91,"latitude":22,"model":107,"epoch":108},[60,61,62,63,64,65,66,67,68,69,70,71,72,73,74],"2N2","J1","K1","K2","M2","M4","MF","MM","N2","O1","P1","Q1","S1","S2","T2",[76,77,78,79,80,81,82,83,84,85,86,87,88,89,90],0.01660041181824135,0.008864706917427835,0.15856081160769622,0.014978959854921363,0.37436624849898736,0.0042252278181846604,0.006986826450846451,0.004284119571496506,0.09360630033018133,0.10273424918302528,0.049059239321224385,0.02544396773070826,0.010149288895030556,0.05336323432304228,0.0004445988724317448,[92,93,94,95,96,97,98,99,100,101,102,103,104,105,106],270.3321578736907,339.71252562975576,304.5051999087173,297.9992416380124,311.716149183927,237.87968391002204,171.99426858132244,174.55274084073824,299.62608627120875,275.4380524995104,301.13366307847,249.4421690665053,35.15274741060532,317.28897320196825,179.4251823357498,"EOT20","1992-01-01T00:00:00Z",[110,116,120],{"name":111,"description":112,"severity":113,"season_start":114,"season_end":115},"Surging swells at blowhole","The blowhole itself is extremely dangerous during large swells — powerful surges can sweep people off rocks.","danger",5,9,{"name":117,"description":118,"severity":119,"season_start":56,"season_end":56},"Slippery granite rocks","Granite boulders become very slick when wet, posing a slip and fall risk.","warning",{"name":121,"description":122,"severity":123,"season_start":56,"season_end":56},"Changing tides","Tidal flow can affect entry and exit points, with exposed rocks at low tide and deeper surge at high tide.","caution",{"directions":125,"parking":126,"facilities":127,"fees":129,"access_method":130},"Located near St Helens on Tasmania's northeast coast, approximately 11 km south of St Helens township. Follow the Tasman Highway (A3) south towards Binalong Bay and the Bay of Fires area. The Blow Hole is accessible via short walking tracks from coastal parking areas.","Limited roadside parking available near the Blow Hole overlook and adjacent beaches along the coastal road.",[128],"parking","No fees for access.","shore_entry","2026-07-27T02:57:38.121943Z","2026-08-04T05:37:15.121095Z",{"verdict":134,"evaluated_at":135,"models":136},"go","2026-10-03T02:19:51.327098Z",[137,144,149],{"model_name":138,"is_favourable":139,"value":140,"threshold":141,"unit":142,"operator":143},"Wind Speed",true,7.06,10,"kn","lte",{"model_name":145,"is_favourable":139,"value":146,"threshold":147,"unit":148,"operator":143},"Wave Height",0.27,0.5,"m",{"model_name":150,"is_favourable":139,"value":151,"threshold":40,"unit":152,"operator":153},"Visibility",2.31,"","gte",{"verdict":134,"rating":155,"evaluated_at":135,"generated_at":135,"source":156,"confidence":157,"visibility":160,"parameters":161,"models_passed":114,"models_total":114},"Excellent","precomputed",{"level":158,"value":159},"High",100,{"score":151,"rating":56,"confidence":56},[162,163,169,172,177],{"name":145,"value":146,"label":56,"unit":148,"favourable":139,"score":43,"optimal_max":147,"marginal_max":36},{"name":164,"value":165,"label":56,"unit":166,"favourable":139,"score":43,"optimal_max":167,"marginal_max":168},"Swell Period",6.6,"s",8,12,{"name":138,"value":170,"label":56,"unit":142,"favourable":139,"score":43,"optimal_max":141,"marginal_max":171},7.0561392,15,{"name":173,"value":174,"label":56,"unit":175,"favourable":139,"score":43,"optimal_max":114,"marginal_max":176},"Precipitation",3.9,"mm",20,{"name":178,"value":56,"label":179,"unit":152,"favourable":139,"score":43,"optimal_max":56,"marginal_max":56},"Tidal Phase","slack",[],{"display_name":182},"Daniel","unverified",false,1791009132580]